Honeywell UDC2500 User Manual

Page 58

Configuration

UDC2500 Universal Digital Controller Product Manual

4/07

Function Prompts

Table 3-6 ATUNE Group (Numeric Code 300) Function Prompts

Function Prompt

Lower Display

Selection or Range of Setting

Upper Display

English

Numeric

Code

English

Numeric

Code

Parameter

Definition

FUZZY 301

DIS

ENAB

FUZZY OVERSHOOT SUPPRESSION—
Can be enabled or disabled independently of
whether Demand Tuning or SP Tuning is
enabled or disabled.

DISABLE—Disables Fuzzy Overshoot
Suppression.

ENABLE—The UDC uses Fuzzy Logic to
suppress or minimize any overshoot that
may occur when PV approaches SP. It will
not recalculate any new tuning parameters.

TUNE 302

DIS
TUNE

0
1

ACCUTUNE III

DISABLE —Disables the Accutune function.

DEMAND TUNING—If TUNE is selected,
and tuning is initiated through the operator
interface or digital input (if configured), the
algorithm calculates new tuning parameters
and enters them into the tuning group. This
tuning requires no process knowledge and
does not require line out for initialization.

DUPLEX 303

DUPLEX ACCUTUNING III – These prompts
only appear when a duplex output type has
been configured.

MANU

MANUAL – Tune manually using LSP 1 and
LSP 2 values. LSP 1 is used to derive tuning
parameters associated with HEAT (output >
50 %). LSP 2 is used to derive tuning
parameters associated with COOL (output <
50 %).

AUTO

AUTOMATIC – Tuning is performed
automatically on both HEAT and COOL
sequentially. LSP 1 is used for HEAT tuning
and LSP 2 is used for COOL tuning. To
initiate tuning, either LSP 1 or LSP 2 must be
in use.